Section R. 400.10565 - GaragesRule 565.
(1) Garages that are located beneath a facility shall have walls, partitions, floors, and ceilings separating the garage space from the rest of the facility by construction that has not less than a 1-hour-fire-resistance rating.(2) In newly constructed, remodeled, or converted facilities, a garage that is located beneath the facility shall be sprinklered.(3) Garages that are attached to a facility shall be completely separated from the rest of the facility by construction that has not less than a 1-hour-fire-resistance rating.(4) In all new, remodeled, or converted facilities, the sills of all door openings between the garage and breezeway or the garage and the facility shall be raised not less than 4 inches above the garage.(5) In existing facilities, garages which are located beneath or attached to the facility and which are approved before these rules take effect shall continue to be approved until the facility is converted or the portion of the facility that contains the garage is remodeled.Mich. Admin. Code R. 400.10565